(...)
Seriously this made me think twice and have made me roam through all my exchange accounts and wallets making sure that i have access to them in order to cash out all those pieces of bitcoin if they ever become worth it again.
Let's hope also that those exchange will not close until the time you wish for. Especially waiting to double the price of Bitcoin.
To avoid scarry for the possible closing of the some exchange choose strong exchange like binance, bittrex cincase, poloniex that exchange I guarantee that said exchange is surely stable less worry for the security of the investment.